I'm not sure what you need? you need older version than SCH-27516 Rev.B3??
if you just need imx6q board schematic, you can find it from nxp official website as below:
i.MX 6Quad SABRE Development Board | NXP
find "Printed Circuit Boards and Schematics ( 1 )"
Dear joanxie,
Thank you for your reply.
If you can provide it, I want the Rev.B3 schematic.
I especially want to check the schematic related to power on sequence, it is difficult to predict the Rev.B3 from the current revision.
BR,
George